The gas with a higher pressure is Helium
Given that temperature and volume is held constant the pressure of a given gas can be calculated as : P = n because for a constant volume and temperature the pressure of a given gas is directly proportional to the number of moles of contained in the gas.
Pressure of Helium
P = n
where n ( number of moles ) = mass of helium / molar mass
= 52 / 4 = 13 moles
Pressure of Ammonia
P = n
where n ( number of moles ) = mass / molar mass of ammonia
= 73 / 17.03
= 4.29 moles
From the calculations above the gas with a higher pressure is Helium.
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